[Home](./index.md) > [@three3d/volume](./volume.md) > [GradientVolumeMaterial](./volume.gradientvolumematerial.md) > [isGradientVolumeMaterial](./volume.gradientvolumematerial.isgradientvolumematerial.md) ## GradientVolumeMaterial.isGradientVolumeMaterial property **Signature:** ```typescript readonly isGradientVolumeMaterial = true; ```